package com.share.web.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

public class FilterEncodingUtil implements Filter{

	private String encoding = null ; 
	
	@Override
	public void destroy() {
	}

	@Override
	public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {
		
		if(null == req.getCharacterEncoding()) {
			if(null == encoding || "".equals(encoding)) {
				encoding = "UTF-8" ;
			}
			req.setCharacterEncoding(encoding) ;
			res.setContentType("text/html") ;
			res.setCharacterEncoding(encoding) ;
		}
		chain.doFilter(req, res) ;
	}

	@Override
	public void init(FilterConfig config) throws ServletException {
		this.encoding = config.getInitParameter("encoding") ;
	}

	
}
